Technology executives are pleading with the government to give them guidance on how to use facial recognition technologies, and now the American Civil Liberties Union is weighing in.

On the heels of a Microsoft statement asking for the federal government to weigh in on the technology, the ACLU has called for a moratorium on the use of the technology by government agencies.

“Congress should take immediate action to put the brakes on this technology with a moratorium on its use, given that it has not been fully debated and its use has never been explicitly authorized,” said Neema Singh Guliani, ACLU legislative counsel, in a statement. “And companies like Microsoft, Amazon, and others should be heeding the calls from the public, employees, and shareholders to stop selling face surveillance technology to governments.”

In May the ACLU released a report on Amazon’s sale of facial recognition technology to different law enforcement agencies. And in June the civil liberties group pressed the company to stop selling the technology. One contract, with the Orlando Police Department, was suspended and then renewed after the uproar.

Meanwhile, Google employees revolted over their company’s work with the government on facial recognition tech… and Microsoft had problems of its own after reports surfaced of the work that the company was doing with the U.S. Immigration and Customs Enforcement service.

Some organizations are already working to regulate how facial recognition technologies are used. At MIT, Joy Buolamwini has created the Algorithmic Justice League, which is pushing a pledge that companies working with the technology can agree to as they work on the tech.

That pledge includes commitments to value human life and dignity, including the refusal to help develop lethal autonomous vehicles or equipping law enforcement with facial analysis products.